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led switch Answered

my dad is redoing his basement and he wants to have a panel of switches with leds above them.  so that when the switch is on the led above it is on to.  does anyone know how to do this?

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cris11368

9 years ago

I'm new at this but it seems you would need a capacitor to regulate the voltage since I believe LEDs are supposed to run on DC not AC current, also the resistor to run a single LED from 120v is 5.6 Kilo-ohm. If you look at the image bellow you will see what colors the resistor will need to be: Green, blue, red, with silver tolerance band: 56 x 100 = 5.6 kohms, with a tolerance of 10%. Hope someone can expand on this and maybe make it clearer.

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lemoniecris11368

Reply 9 years ago

You wouldn't need a capacitor, but neon is more traditional.

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kelseymh

9 years ago

He could do it with LEDs, using a small relay on each switch connected to a low-voltage (e.g., battery) supply.  Using a heavy-duty resistor to drop 120V mains power down to 3V is an electrical fire just waiting to happen.

You can also buy wall switches already built with an indicator light.  I found them at my local hardware store, or you can find them online.